I am thinking about dropping cable

With the warm temperatures approaching I am thinking about dropping my cable.Will save me $70 + a month.Plus charter just had another price increase :(.To be honest I never hardly watch cable that much.Its just me and my son and we both watch netflix or blu rays..I do like to watch football when football season comes but those are just on standard HD local stations



If I drop my cable will I still be able to get my HD channels like cbs, nbc and abc channels through my TIVO box?



Thanks in advance!!